Nuna Mixx Next: Which brand of convertible car seat will fit?

Hi, Poli,

If by a convertible car seat you mean one that ranges higher than an i-size 0+ - any that goes up to 18/25/36 kg, then none, as those 0-18+ kg car seats are not meant to be clicked on a stroller's chassis.

If you want a system of car seats with the same base, however, I will definitely recommend the Maxi-Cosi FamilyFix base that accommodates the Cabriofix 0+ car seat, and on the same base, the Pearl next step car seat can be added, lasting you to about 4 years of age. The Cabriofix will fit the Nuna Mix Next adapters.